<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        h1{
            color: skyblue;
        }h2{
            color: rebeccapurple;
        }h3{
            color: forestgreen;
        }
    </style>
</head>
<body>
    <h1>H1111111</h1>
    <h2>H2222222</h2>
    <h3>H3333333</h3>
</body>
</html>